The title pretty much says it all.
Print two pin-loop links, a clasp link, and as many regular links as you need, want, or desire.
The links are the same width as the watch, so it continues the Pebble look for the whole band. The clasp acts on a regular link, so there's one less bit to worry about.
I print in pla, and need to heat the links a bit to snap them together. They aren't coming apart without some serious force.